Month-specific sea-surface temperature · France

Calanques de Marseille Sea Temperature in May

17.4°C

63.3°F

In May, sea-surface temperature near Calanques de Marseille has a historical monthly average of 17.4°C. This is not the reading for any particular holiday date.

Across 2023–2025, the lowest and highest yearly May monthly means were 17.1–17.6°C. These are not daily extremes.

Previous month

April · 14.8°C

Change into May: +2.6°C

Next month

June · 21.7°C

Change into next month: +4.3°C

Can you swim or snorkel in Calanques de Marseille in May?

At 17.4°C our temperature-only guide describes the water as cold water. Comfort depends on your cold tolerance, immersion time and wind. A historical average cannot determine whether conditions are safe on any given day.

Do you need a wetsuit?

Use a full 3-5 mm wetsuit and keep the session within your cold-water experience.

Which beach should you choose?

Look for a beach sheltered from the actual forecast waves and wind on your visit. Exposure, currents and entry conditions vary even where water temperatures are similar. Follow local warnings.

Check the current waves, wind and snorkeling forecast →

A live forecast does not predict a future May. Check again close to your trip.

Nearby places in May

Comparable historical averages from independent marine grid cells. Warmer water does not imply safe snorkeling.

Data source and limitations

Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature; 2023–2025. Marine model grid near 43.21, 5.44. Based on 3 yearly monthly means and 2232 recorded samples. Source methodology.

Modelled sea-surface temperatures do not establish underwater visibility, wildlife, calm currents or safe entry.